represents the heavy elements in the universe, the carbon, oxygen, nitrogen, iron, everything except high jen and helium. all of those heaviel elements, every atom in your body that is made of carbon and so forth, was manufactured deep inside a star. and that was blown out, typically in the end stages of the star's life. and later on, it became incorporatedded into our solar system, the earth and -- >> and our bodies. >> it's the rarest stuff in the universe. about 100 of a percent of the universe is made of heavy elements. that's that pyramid at the top. now the big part of the pyramid, which is about a 1/2% that is actually the visible stuff in the universe, the stars. >> that's about 25%? >> no the visible stuff, half a percent. everything we can see. -- when you look out at night -- >> i thought your dark matter was 25% and then your dark energy was what 50%? >> about 70%. >> 70? >> yes. so the dark matter about 25% and the dark at oms, the at oms we can't see about 4 1/2%, that is most of the universe as far ats math and then the dark energy, the stuff making i >>> if you add those eleme